updated for version 7.4.455

Problem:    Completion for :buf does not use 'wildignorecase'. (Akshay H)
Solution:   Pass the 'wildignorecase' flag around.

src/version.c

@@ -741,6 +741,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    455,
 /**/
     454,
 /**/